Remove local Docker dependency overrides after sibling repositories are public

[milindsrivastava1997]

Context

The PromQL compliance Compose build currently supplies ASAPCollector and asap_sketchlib as local Docker build contexts and installs Docker-only Cargo patches. This lets image builds resolve the current private Git dependencies without passing GitHub credentials into Docker.

Follow-up

Once ASAPCollector and asap_sketchlib are public, remove the local build contexts and Docker-only Cargo path patches from data_plane/Dockerfile and control_plane/Dockerfile. Let Cargo resolve the pinned Git dependencies from the repository and lockfile normally.

Acceptance

• Docker builds do not require sibling checkouts.
• Docker builds use the public pinned Git dependencies.
• promql-compliance/docker-compose.yml has no local dependency build contexts.
• The PromQL compliance Compose run can build from a normal backend checkout.